Vehicle with full size spare tire conversion and lifting mechanism

ABSTRACT

A vehicle is disclosed which is normally supported by a plurality of wheels and tires, the vehicle having an article carrying space, with a floor formed of a first material and having an opening. A spare wheel and tire storage well is mounted in the opening through the floor and is formed of a second material different from the first material. The storage well is configured to accommodate a spare wheel and tire substantially equal in width and diameter to at least one of the plurality of wheels and tires supporting the vehicle. Also disclosed is a method for modifying a vehicle to carry a full size spare wheel and tire, including removing a portion of the floor of the vehicle, which portion includes a first storage well, to form an opening in the floor, placing a second storage well in the opening in the floor, the second storage well being configured and to accommodate a full size spare wheel and tire having a maximum width and diameter substantially equal to at least one of the wheels and tires normally supporting the vehicle such that a major portion of a maximum width of the full size spare wheel and tire is located below an upper surface of the floor, and attaching the second storage well to the floor. A lifting mechanism is disclosed to assist in the removal of the spare wheel and tire from the storage well. A force generating mechanism raises the spare wheel and tire when a securing device is removed.

[0001] The present invention is a Divisional of U.S. patent application Ser. No. 09/772,897, filed Oct. 29, 1999.

BACKGROUND OF THE INVENTION

[0002] The present invention relates to a vehicle having an article carrying space, such as a trunk, which is converted to carry a full size spare tire and a method for carrying out such conversion. The invention also relates to a lifting mechanism to raise the full size spare tire from its storage position to assist in the removal of the full size spare tire from the vehicle.

[0003] Temporary or space saver spare tires have achieved great popularity within the last few years. Typically such tires comprise a wheel having a lug pattern to fit the lug pattern of the wheels normally supporting the vehicle, the wheel having a smaller diameter than the normal vehicle wheels and a high pressure tire, also having a smaller outer diameter than those of the normal vehicle tires. By reducing the diameter of the wheel and the tire, a manufacturer is able to reduce the amount of storage space that is required for carrying the temporary spare tire. By minimizing the storage volume necessary for the temporary spare tire, the manufacturer may maximize the article carrying capacity of the vehicle. In a sedan-type vehicle, the temporary spare tire is normally stored in a storage well formed in a floor of the trunk of the vehicle. The reduced dimensions of the temporary spare tire enable the spare tire to be stored and covered and not protrude into the article carrying space.

[0004] Although such temporary or space saver spare tires have achieved great popularity, they are not without their drawbacks. Such spare tires have limited mileage in which they may be used and many have limitations regarding the speed the vehicle may be driven while such temporary spare tires are in use. In addition the mileage and speed limitations, the smaller diameter of the tire associated with the temporary spare drastically alters the attitude of the vehicle when the temporary spare is in use, creating discomfort to the passengers of the vehicle and possibly causing handling difficulties.

[0005] While these difficulties may be acceptable in vehicles utilized for personal transportation, they are not acceptable for commercial vehicles, such as limousines and taxicabs. Commercial vehicle users require that their passengers be transported as quickly as possible and with no discomfort. The use of a temporary or space saver spare on such a commercial vehicle would limit the speed and the distance the vehicle could be driven, and would provide discomfort to the passengers. In addition, many jurisdictions require commercially registered vehicles to carry a full size spare tire, i.e., a tire having the same dimensions as the tires normally utilized on the vehicle.

[0006] The storage well formed in the floor of the article carrying space of the vehicle is sized to accept only a temporary, or space saver spare tire. Thus, it is impossible due to the reduced diameter and depth of such a storage well, to place a full size spare tire in the storage well. It is, of course, possible to merely place the full size spare tire in the article carrying space of the vehicle. However, this seriously reduces the ability of the commercial vehicles to carry packages, luggage, etc., for their passengers. Due to the severe limitation of article carrying space, placing the full size spare in the article carrying space is not a viable option.

[0007] Thus, there is believed to be a need for a vehicle, when it is converted into a commercial vehicle, such as a limousine, taxicab, etc., to accommodate a full size spare wheel and tire with at least a majority of the maximum width of the spare tire located below the level of the floor of the article carrying space. This would not only enable the vehicle to carry such a full size spare, but would minimize the intrusion of the full size spare tire in the article carrying space.

[0008] Quite obviously, a full size spare tire is heavier and more difficult to remove from the article carrying space, or to place into the article carrying space. Therefore, there is also believed to be a need for a full sized spare tire lifting assist mechanism to assist the user in removing and replacing the full size spare tire.

SUMMARY OF THE INVENTION

[0009] A vehicle is disclosed which is normally supported by a plurality of wheels and tires, the vehicle having a body bounding an article carrying space, such as a trunk, with a floor located in the article carrying space, the floor being formed of a first material and having an opening therethrough. The vehicle also has a spare wheel and tire storage well mounted in the opening through the floor and being formed of a second material different from the first material, the storage well configured so as to accommodate a spare wheel and tire such that a major portion of a maximum width of the spare wheel and tire is located below the surface of the floor, the spare wheel and tire being substantially equal in width and diameter to at least one of the plurality of wheels and tires supporting the vehicle.

[0010] Also disclosed is a method for modifying a vehicle to carry a full size spare wheel and tire. The vehicle normally has an article carrying space including a floor with a first storage well for carrying a temporary spare wheel and tire. The method includes removing a portion of the floor of the vehicle, which portion includes the first storage well, to form an opening in the floor, placing a second storage well in the opening in the floor, the second storage well being configured and to accommodate a full size spare wheel and tire having a maximum width and diameter substantially equal to at last one of the wheels and tires normally supporting the vehicle such that a major portion of a maximum width of the full size spare wheel and tire is located below an upper surface of the floor, and attaching the second storage well to the floor.

[0011] Typically, the floor of the article carrying space comprises a metallic material, such as sheet metal. The storage well accommodating the full size spare tire is formed of a different material, such as a fiber reinforced plastic material. A flange extending outwardly from the full size spare tire storage well is attached to the floor of the article carrying space. The flange may be attached to an upper surface of the floor, or a lower surface of the floor, by bonding, the use of mechanical fasteners, or any other known techniques. According to this invention, approximately 85% of the maximum width of the full size spare tire is located below the upper surface of the floor to minimize the reduction in article storage space.

[0012] The present invention also encompasses a vehicle having a body bounding an article carrying space including a floor with a spare wheel and tire storage well incorporating a lifting device for lifting a spare wheel and tire from a stored position within the storage well, in which position a major portion of a maximum width of the spare wheel and tire is located below an upper surface of the floor, to a use position in which at least a major portion of the maximum width of the spare wheel and tire is located above the upper surface of the floor.

BRIEF DESCRIPTION OF THE DRAWINGS

[0013]FIG. 1 is a partial, perspective view of a sedan-type vehicle illustrating a known temporary spare wheel and tire storage well in the trunk.

[0014]FIG. 2 is a partial, cross-sectional view taken along line II-II in FIG. 1.

[0015]FIG. 3 is a cross-sectional view, similar to FIG. 2, illustrating a full size spare wheel and tire being stored in the storage well of FIGS. 1 and 2.

[0016]FIG. 4 is a cross-sectional view illustrating the removal of the temporary spare wheel and tire storage well, according to the present invention.

[0017]FIG. 5 is a cross-sectional view, similar to FIG. 4, illustrating the installation of a storage well configured to accept a full size spare wheel and tire.

[0018]FIG. 6 is a cross-sectional view, similar to FIG. 5, illustrating the full size spare wheel and tire located within the storage well of FIG. 5.

[0019]FIG. 7 is a partial, perspective view of a sedan-type vehicle having the storage well according to the present invention installed in a trunk floor.

[0020]FIG. 8 is a cross-sectional view, similar to FIG. 5, illustrating the full size storage well attached to a bottom surface of the trunk floor.

[0021]FIG. 9 is a cross-sectional view, similar to FIG. 5, illustrating another alternative embodiment in which the full size spare wheel and tire storage well is attached to the trunk floor by mechanical fasteners.

[0022]FIG. 10 is an exploded schematic view illustrating the spare wheel and tire lifting mechanism according to the present invention.

[0023]FIG. 11 is a cross-sectional view taken along line XI-XI in FIG. 10.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] A known vehicle is illustrated in FIG. 1 having a vehicle body 10 bounding an article carrying space 12, in this particular instance a trunk. Although the invention will be described in conjunction with a sedan-type vehicle having a trunk, it is to be understood that the principles elucidated herein are also applicable to a station wagon type vehicle having an elongated article carrying space which communicates with the passenger carrying space. Typically, the vehicle body 10 includes a trunk lid 14, illustrated in an open position, but which is closable to enclose the article carrying space 12.

[0025] The article carrying space 12 has a floor 16 with a storage well 18 formed therein to accommodate a temporary, or space saving spare wheel and tire. The terminology “temporary” or “space saving” spare wheel and tire is to be understood to mean a spare wheel and tire having a smaller diameter and smaller maximum width than the corresponding dimensions of the wheels and tires normally supporting the vehicle.

[0026] As illustrated in FIG. 2, the temporary spare wheel and tire storage well 18 has a diameter sufficient to accommodate the outer diameter of the temporary spare wheel and tire 20, and a depth d₁ sufficient to locate the maximum width of the spare wheel and tire 20 equal to or slightly below an upper surface of floor 16. A cover 22 may be placed over the temporary spare tire and wheel storage well 18 as is well known in the art.

[0027] As discussed previously, it is highly desirable for a commercial vehicle, such as a limousine, taxicab, etc., to carry a full size spare wheel and tire. The term “full size” is to be understood to mean a spare wheel and tire having a diameter and maximum width substantially the same as at least one of the wheels and tires normally supporting the vehicle. However, when a vehicle is converted from a personal use type vehicle to a commercial vehicle, the article carrying space has a spare wheel and tire storage well that is sized to accommodate only a temporary or space saving spare wheel and tire. If a full size spare wheel and tire is placed into the storage well sized to accommodate a temporary spare wheel and tire, the full size spare wheel and tire 24 will protrude into the article carrying space, as illustrated in FIG. 3, thereby significantly reducing the article carrying space.

[0028] In order to solve this problem, the present invention provides a method for converting the storage well into one which will accommodate a full size spare wheel and tire. The conversion method encompasses the step of removing the storage well 18, which is configured to accept only a temporary wheel and tire from the floor 16, as illustrated in FIG. 4, which creates an opening 28 through the floor 16. The size of opening 28 is sufficient to accommodate a new spare tire storage well 26 which is configured to accept a full size spare wheel and tire therein. The full size spare wheel and tire storage well 26 is then attached to the floor 16. Storage well 26 may have an outwardly extending flange 26 a extending from opposite sides, or extending around the upper periphery of the storage well 26. Flange 26 a may be attached to an upper surface of the floor 16, as illustrated in FIG. 5, or may be attached to a lower surface of the floor 16, as illustrated in FIG. 8. In either case, the storage well 26 is made of a material different from that of the floor 16, such as a fiber reinforced plastic, fiberglass or other composite material. The flange 26 a may be attached to the floor 16 by utilizing known bonding materials to bond the flange 26 a to either the upper surface or the lower surface of floor 16. One or more mechanical fasteners, such as threaded screws 30 or bolts 32 may be utilized in conjunction with the bonding material, or may be utilized alone to attach the flange 26 a to the floor 16, as illustrated in FIG. 9. Although FIG. 9 illustrates the flange 26 a attached to the upper surface of floor 16, it is to be understood that mechanical fasteners may also be utilized with the orientation illustrated in FIG. 8 wherein the flange 26 a is attached to a lower surface of the floor 16.

[0029]FIG. 6 is a cross-sectional view similar to FIG. 2, illustrating the full size spare wheel and tire 24 placed in the storage well 26. The depth d₂ of the storage well 26 is greater than depth d₁ and is sufficient to accommodate a major portion of the maximum width of the spare wheel and tire 24 below an upper surface of the floor 16, and is preferably of sufficient depth to accommodate at least 85% of the maximum width of the full size spare wheel and tire 24 below the upper surface of the floor 16. In known fashion, the full size spare wheel and tire 24 may be retained in place by threaded wing nut 34 engaging fixed nut 36. If desired, a cover similar to cover 22 may be placed across the upper opening of the storage well 26 so as to cover the full size spare wheel and tire 24.

[0030]FIG. 7 illustrates the vehicle 10 after undergoing the conversion according to this invention. As can be seen, the storage well 26 can accommodate a full size spare wheel and tire 24 without significant intrusion into the article storage space 12.

[0031] A full size spare wheel and tire is, of course, heavier than a temporary spare wheel and tire, and occupies a greater volume, thereby increasing the difficulty in removing the full size spare wheel and tire from the storage well 26, or placing the spare wheel and tire in the storage well. To circumvent these potential difficulties, the present invention also encompasses a spare wheel and tire lifting mechanism to raise the full size spare wheel and tire upwardly from the storage well 26 to a position where it may be more easily manipulated by a user. The present invention also encompasses such a lifting mechanism which may be associated with any type of spare wheel and tire storage well in order to raise the spare tire from a storage position within the storage well.

[0032] As best seen in FIG. 10, the spare wheel and tire lifting mechanism 38 comprises a force generating mechanism having a first portion, consisting of a base member 40 and a sleeve member 42 fixedly attached to and extending upwardly from the base member 40, and a second portion having a wheel support member 44 with a generally cylindrical wheel locating member 46 fixedly connected to, and extending upwardly from the wheel support member 44. As can be seen in FIG. 11, the wheel locating member 46 and the sleeve member 42 may comprise hollow cylindrical members and are sized such that the sleeve member 42 may be slidably received within the interior of the wheel locating member 46. The exterior dimensions of the wheel locating member 46 are such that it may be received in a central opening 24 a which exists through the center of the wheel of the full size spare wheel and tire 24. A lower end of the sleeve member 42 is fixedly attached to the base member 40 by any known method, such as by bolts 48.

[0033] A force generating mechanism, such as a known type of pressurized gas spring 50 is located within the hollow interiors of the wheel locating member 46 and the sleeve member 42. As is well known in the art, such gas spring assemblies 50 comprise a cylinder portion 50 a containing a pressurized gas, and a piston rod 50 b that is movably received within the cylinder 50 a and has an internal piston on which the pressurized gas acts so as to normally bias the piston rod 50 b to an extended position, as illustrated in FIG. 11. A compression coil spring may be located in cylinder portion 50 a to assist the pressurized gas, or the coil spring may supply 100% of the biasing force. In such instance, the coil spring will act between the piston rod 50 b and the closed end of the cylinder portion 50 a. An upper end of the cylinder portion 50 a is fixedly attached to an end of the wheel locating member 46, such as by fastener 52. Fastener 52 attaches these elements together such that there is no relative motion between them. A distal end of the piston rod 50 is fixedly attached to the base member 40 such as by a threaded end portion 50 c of the piston rod 50 b which may be threaded into the base member 40. Again, such connection prevents any relative movement between the piston rod 50 b and the assembly comprising the base plate 40 and the sleeve member 42.

[0034] Force generating member 50 typically has a stopping mechanism which limits the extension of the piston rod 50 b from the cylinder 50 a. In this maximum extended position, as illustrated in FIG. 11, the upper end of the sleeve member 42 is received within the interior of the wheel locating member 46. The upward force generated by the force generating mechanism 50 should be sufficient to hold the weight of the spare wheel and tire on the wheel support member 44 without noticeably retracting the piston rod 50 b within the cylinder 50 a. However, such force should allow a user to force the cylinder 50 a, along with the wheel locating member 46 and wheel support member 44 downwardly by exerting a slight force on the full size spare wheel and tire 24. Once the spare wheel and tire 24 has reached its storage position, securing lugs 54 pass through slots 56 formed in the wheel support member 44 and engage an existing lug opening 24 b in the wheel of the spare wheel and tire 24. Although a single securing lug 54 is illustrated in FIG. 10, it is to be understood that a plurality of such lugs may be utilized, as illustrated in FIG. 11. The securing lugs are positioned so that they may engage one or more of the existing holes in the wheel of the spare wheel and tie 24.

[0035] Once the spare wheel and tire 24 as in the storage position, it may be held in this position by attaching a wing nut or the like 58 to the securing lugs 54.

[0036] In order to remove the full size spare wheel and tire 24 from its storage position within the storage well 26, it is merely necessary to undue the wing nuts 48 from the securing lugs 54 to allow the force generating mechanism 50 to raise the spare wheel and tire 24 from the storage position to a position in which it is located above the storage well to thereby facilitate its removal. In order to facilitate the positioning of the spare wheel and tire 24 so as to engage the one or more securing lugs 54, slots 56 formed in the wheel support member 44 may be arcuate in configuration, as illustrated in FIG. 10. This will enable the spare wheel and tire 24, as well as the wheel support member 44 to be readily manipulated to align the securing lugs 54 with an existing opening in the wheel of the spare wheel and tire 24.

[0037] Base member 40 may be fixedly attached to a bottom wall of the storage well 26 by known mechanical fasteners, or may be fixedly attached to the wall during the forming of the storage well 26 from composite materials such as by molding. The base member 40 may be integrally molded in the bottom wall, if desired.

[0038] The base member 40 may have attachment openings 60 formed therein to facilitate the attachment of the base member 40 to the bottom wall of the storage well. Quite obviously, the base member 40 may be attached to a bottom wall of an existing spare wheel and tire storage well to facilitate the removal and placement of the spare wheel and tire into or from the storage well.

[0039] The foregoing description is provided for illustrative purposes only and should not be construed as in any way limiting this invention, the scope of which is defined solely by the appended claims. 

What is claimed is:
 1. A vehicle supported by a plurality of wheels and tires, and having a body bounding an article carrying space, the vehicle comprising: a) a floor located in the article carrying space, the floor being formed of a first material and having an oping therethrough; and b) a spare wheel and tire storage well mounted in the opening through the floor and being formed of a second material, different from the first material, the storage well configured so as to accommodate a spare wheel and tire therein such that a major portion of a maximum width of the spare wheel and tire is located below the floor, the spare wheel and tire being substantially equal in width and diameter to at least one of the plurality of wheels and tires supporting the vehicle.
 2. The vehicle of claim 1 wherein the first material is a metallic material and the second material is a non-metallic material.
 3. The vehicle of claim 2 wherein the non-metallic material comprises a fiber reinforced plastic material.
 4. The vehicle of claim 1 wherein the storage well further comprises an outwardly extending flange connected to the floor.
 5. The vehicle of claim 4 further comprising a bonding material bonding the flange of the storage well to the floor.
 6. The vehicle of claim 4 further comprising at least one mechanical fastener attaching the flange to the floor.
 7. The vehicle of claim 6 wherein the at least one mechanical fastener comprises at least one threaded fastener.
 8. The vehicle of claim 4 wherein the flange is attached to an upper surface of the floor.
 9. The vehicle of claim 4 wherein the flange is attached to a lower surface of a floor.
 10. The vehicle of claim 1 wherein approximately 85% of the maximum width of the spare wheel and tire is located below an upper surface of the floor.
 11. The vehicle of claim 1 further comprising a lifting device mounted in the spare wheel and tire storage well for lifting the spare wheel and tire from a storage position in which the major portion of the maximum width of the spare wheel and tire is located below an upper surface of the floor, to a use position in which at least a major portion of the maximum width of the spare wheel and tire is located above the upper surface of the floor.
 12. The vehicle of claim 11 wherein the spare wheel and tire storage well has a bottom well and wherein the lifting device is mounted on the bottom wall.
 13. The vehicle of claim 11 wherein the lifting device comprises a force generating mechanism having first and second portions relatively movable with respect to each other, the first portion action on the spare wheel and tire storage well and the second portion acting on the spare wheel and tire, wherein the force generating mechanism generates a lifting force sufficient to raise the spare wheel and tire to the use position.
 14. The vehicle of claim 13 wherein the force generating mechanism comprises a pressurized gas spring.
 15. The vehicle of claim 13 wherein the second portion comprises a wheel support member having a wheel locating member extending therefrom, the wheel locating member configured to extend through an existing hole in a wheel of the spare wheel and tire.
 16. The vehicle of claim 15 wherein the first portion comprises: a) a base member, and b) a rod member extending from the base member and movably connected to the second portion.
 17. The vehicle of claim 16 further comprising a securing mechanism to secure the spare wheel and tire to the base member thereby holding the spare wheel and tire in the storage position against a force of the force generating mechanism.
 18. The vehicle of claim 17 wherein the receiving mechanism comprises a securing member extending from the base member and located so as to extend through an existing hole in a wheel of the spare wheel and tire, and a locking device engaged with the securing member and located on a side of the wheel opposite to the base member.
 19. The vehicle of claim 18 wherein the securing member is threaded and the locking device comprises a nut threaded onto the securing member.
 20. The vehicle of claim 18 further comprising a slot in the wheel support member located such that the securing member extends through the slot.
 21. A method of modifying a vehicle to carry a full size spare wheel and tire, the vehicle having an article carrying space including a floor having a first storage well for carrying a temporary spare wheel and tire having a width and a diameter less than those of wheels and tires supporting the vehicle, the method comprising the steps of: a) removing a portion of the floor including the first storage well, thereby forming an opening in the floor; b) placing a second storage well in the opening in the floor, the second storage well configured to accommodate a full size spare wheel and tire having a maximum width and diameter equal to at least one of the wheels and tires supporting the vehicle such that a major portion of the of a maximum width of the full size spare wheel and tire is below an upper surface of the floor; and, c) attaching the second storage well to the floor.
 22. The method of claim 21 wherein the floor and second storage well are formed of different materials.
 23. The method of claim 22 wherein the floor is formed of a metallic material and the second storage well is formed of a non-metallic material.
 24. The method of claim 23 wherein the second storage well is formed of a fiber reinforced plastic material.
 25. The method of claim 21 wherein the second storage well has an outwardly extending flange and further comprising the step of attaching the flange to the floor.
 26. The method of claim 25 further comprising attaching the flange to an upper side of the floor.
 27. The method of claim 25 further comprising attaching the flange to a lower surface of the floor.
 28. The method of claim 25 wherein the flange is attached to the floor by bonding.
 29. The method of claim 25 wherein the flange is attached to the floor using mechanical fasteners.
 30. The method of claim 29 wherein the flange is attached to the floor using threaded mechanical fasteners.
 31. The method of claim 21 comprising the additional step of mounting a spare wheel and tire lifting device to the second storage well.
 32. The method of claim 31 wherein the second storage well has a bottom wall and comprising the step of mounting the spare wheel and tire lifting device to the bottom wall.
 33. The method of claim 31 comprising the additional step of providing the spare wheel and tire lifting device as a force generating mechanism having first and second portions relatively movable with respect to each other prior to mounting the first portion to the second storage well.
 34. The method of claim 33 comprising the additional step of using a pressurized gas spring as the force generating mechanism.
 35. The method of claim 33 comprising the additional step of providing the second portion of the force generating mechanism with a wheel support member having a wheel locating member extending therefrom.
 36. The method of claim 35 comprising the additional step of providing the first portion of the force generating mechanism with a base member and a sleeve member extending therefrom.
 37. The method of claim 36 comprising the additional step of providing a spare wheel and tire securing mechanism on the base member, the securing mechanism having a securing member extending from the base member and a locking device removably engaging the securing member.
 38. A vehicle having a body bounding an article carrying space including a floor with a spare wheel and tire storage well and comprising a lifting device for lifting a spare wheel and tire from a stored position wherein a major portion of a maximum width of the spare wheel and tire is located below an upper surface of the floor, to a use position in which at least a major portion of the maximum width of the spare wheel and tire is located above the upper surface of the floor.
 39. The vehicle of claim 38 wherein the spare wheel and tire storage well has a bottom wall and wherein the lifting device is mounted on the bottom wall.
 40. The vehicle of claim 38 wherein the lifting device comprises a force generating mechanism having first and second portions relatively movable with respect to each other, the first portion action on the spare wheel and tire storage well and the second portion acting on the spare wheel and tire, wherein the force generating mechanism generates a lifting force sufficient to raise the spare wheel and tire to the use position.
 41. The vehicle of claim 40 wherein the force generating mechanism comprises a pressurized gas spring.
 42. The vehicle of claim 40 wherein the second portion comprises a wheel support member having a wheel locating member extending therefrom, the wheel locating member configured to extend through an existing hole in a wheel of the spare wheel and tire.
 43. The vehicle of claim 42 wherein the first portion comprises: a) a base member; and b) a sleeve member extending from the base member and movably connected to the second portion.
 44. The vehicle of claim 43 further comprising a securing mechanism to secure the spare wheel and tire to the base member thereby holding the spare wheel and tire in the storage position against a force of the force generating mechanism.
 45. The vehicle of claim 44 wherein the receiving mechanism comprises a securing member extending from the base member and located so as to extend through an existing hole in a wheel of the spare wheel and tire, and a locking device engaged with the securing member and located on a side of the wheel opposite to the base member.
 46. The vehicle of claim 45 wherein the securing member is threaded and the locking device comprises a nut threaded onto the securing member.
 47. The vehicle of claim 46 further comprising a slot in the wheel support member located such that the securing member extends through the slot. 